Matthew Lewis, from Pontypool, believed he was chatting with underage girls but was caught by paedophile hunters and sentenced at Newport Crown Court.
Julian Hobbs, 36, was sentenced at Merthyr Crown Court after being convicted of multiple sexual offences against a girl under 13.
David Cwiklinski, 52, from Magor, was sentenced to three years and two months at Newport Crown Court after nearly 1,000 indecent images were found at his home.
Christopher Scrivens, who was jailed for importing cannabis from California, has been ordered to pay back £233,737 at Newport Crown Court or face a further three years behind bars.
Rodney Roberts, 40, from Cardiff, used the alias Paul Smith to con three women out of nearly £50,000 through online dating platforms between 2021 and 2024.
Jordan Coles, 29, repeatedly punched and kicked stroke victim William Murphy in the head after drinking in an Abergavenny pub, leaving him with a bleed on the brain.
Marley Burgess, 26, from Cardiff, was sentenced to 17 months at Newport Crown Court after admitting to a string of violent assaults against his partner.
Benjamin Bird, 36, from Newport was sentenced at Newport Crown Court after admitting a string of domestic violence offences against his former partner, including strangulation and suffocation.
Hazel Templeton was found guilty of four counts of indecent assault on a male under 14 following a trial at Newport Crown Court.
Patrick Teehan, 57, took more than £82,000 from 15 victims and used fake suicide attempts and lies about his wife having cancer as excuses for not completing work.
Jason Bartlett, 47, was jailed for 32 months after officers caught him mid-deal in Cwmbran and found heroin and crack cocaine.
Rizwan Mohammed, 19, drove the wrong way around a roundabout and reversed into police cars during a high-speed chase before officers found crack cocaine worth more than £2,000.